<template>
  <div class="reports-page">
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <!-- 2. 为ECharts准备一个具备大小（宽高）的Dom -->
      <div id="main" style="width: 650px; height: 300px"></div>
    </el-card>
  </div>
</template>

<script>
import * as echarts from "echarts";
import _ from "lodash";
import { getReportsApi } from "@/api/reports";
export default {
  name: "reportsPage",
  data() {
    return {
      // 需要合并的数据
      options: {
        title: {
          text: "用户来源",
        },
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "cross",
            label: {
              backgroundColor: "#E9EEF3",
            },
          },
        },
        grid: {
          left: "3%",
          right: "4%",
          bottom: "3%",
          containLabel: true,
        },
        xAxis: [
          {
            boundaryGap: false,
          },
        ],
        yAxis: [
          {
            type: "value",
          },
        ],
      },
    };
  },
  async mounted() {
    // 3. 基于准备好的dom，初始化echarts实例
    const myChart = echarts.init(document.getElementById("main"));
    const res = await getReportsApi();
    if (res.meta.status !== 200) {
      return this.$message.error("获取折线图数据失败!");
    }
    // 4. 指定图表的配置项和数据
    const result = _.merge(res.data, this.options);
    // 5. 使用刚指定的配置项和数据显示图表。
    myChart.setOption(result);
  },
};
</script>

<style lang="scss" scoped>
.el-breadcrumb {
  margin-bottom: 15px;
}
</style>
